Phase evolution and magnetic properties of Al substituted yttrium iron garnet nanopowders and plasma-sprayed coatings

B. G. Ravi; X. Z. Guo; Q. Y. Yan; R. J. Gambino; S. Sampath; J. B. Parise

doi:10.1016/j.surfcoat.2007.02.024

Phase evolution and magnetic properties of Al substituted yttrium iron garnet nanopowders and plasma-sprayed coatings

B. G. Ravi
, X. Z. Guo
, Q. Y. Yan
, R. J. Gambino
, S. Sampath
, J. B. Parise

Stony Brook University

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Aluminum-substituted yttrium iron garnet (Al-YIG) nanostructured powders were synthesized using a citrate-nitrate gel combustion process. Atmospheric plasma-spray (APS) technique was employed to spray deposit the combustion derived feedstock powders. Nevertheless incongruently melting YIG resulted into a two-phase microstructure, Al-YIG powder resulted into a nanostructured garnet single phase when sprayed through thermal plasma. Room temperature saturation magnetization (M_S) and Curie temperature (T_C) of the Al-YIG powders decreased as a function of increasing Al content. As-sprayed YFe_3.8Al_1.2O₁₂ coating has a room temperature M_S of 6.2 emu/cc and is increased to 7.3 emu/cc after post-deposition heat treatment at 1000 °C/1 h. Microstructural characteristics of single splats were analyzed in order to understand the feedstock effect on deposit.

Original language	English
Pages (from-to)	7597-7605
Number of pages	9
Journal	Surface and Coatings Technology
Volume	201
Issue number	16-17
DOIs	https://doi.org/10.1016/j.surfcoat.2007.02.024
State	Published - May 21 2007

Keywords

Iron oxide
Magnetic properties
Nanostructure
Thermal spraying

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10.1016/j.surfcoat.2007.02.024

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title = "Phase evolution and magnetic properties of Al substituted yttrium iron garnet nanopowders and plasma-sprayed coatings",

abstract = "Aluminum-substituted yttrium iron garnet (Al-YIG) nanostructured powders were synthesized using a citrate-nitrate gel combustion process. Atmospheric plasma-spray (APS) technique was employed to spray deposit the combustion derived feedstock powders. Nevertheless incongruently melting YIG resulted into a two-phase microstructure, Al-YIG powder resulted into a nanostructured garnet single phase when sprayed through thermal plasma. Room temperature saturation magnetization (MS) and Curie temperature (TC) of the Al-YIG powders decreased as a function of increasing Al content. As-sprayed YFe3.8Al1.2O12 coating has a room temperature MS of 6.2 emu/cc and is increased to 7.3 emu/cc after post-deposition heat treatment at 1000 °C/1 h. Microstructural characteristics of single splats were analyzed in order to understand the feedstock effect on deposit.",

keywords = "Iron oxide, Magnetic properties, Nanostructure, Thermal spraying",

author = "Ravi, \{B. G.\} and Guo, \{X. Z.\} and Yan, \{Q. Y.\} and Gambino, \{R. J.\} and S. Sampath and Parise, \{J. B.\}",

year = "2007",

month = may,

day = "21",

doi = "10.1016/j.surfcoat.2007.02.024",

language = "English",

volume = "201",

pages = "7597--7605",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

number = "16-17",

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TY - JOUR

T1 - Phase evolution and magnetic properties of Al substituted yttrium iron garnet nanopowders and plasma-sprayed coatings

AU - Ravi, B. G.

AU - Guo, X. Z.

AU - Yan, Q. Y.

AU - Gambino, R. J.

AU - Sampath, S.

AU - Parise, J. B.

PY - 2007/5/21

Y1 - 2007/5/21

N2 - Aluminum-substituted yttrium iron garnet (Al-YIG) nanostructured powders were synthesized using a citrate-nitrate gel combustion process. Atmospheric plasma-spray (APS) technique was employed to spray deposit the combustion derived feedstock powders. Nevertheless incongruently melting YIG resulted into a two-phase microstructure, Al-YIG powder resulted into a nanostructured garnet single phase when sprayed through thermal plasma. Room temperature saturation magnetization (MS) and Curie temperature (TC) of the Al-YIG powders decreased as a function of increasing Al content. As-sprayed YFe3.8Al1.2O12 coating has a room temperature MS of 6.2 emu/cc and is increased to 7.3 emu/cc after post-deposition heat treatment at 1000 °C/1 h. Microstructural characteristics of single splats were analyzed in order to understand the feedstock effect on deposit.

AB - Aluminum-substituted yttrium iron garnet (Al-YIG) nanostructured powders were synthesized using a citrate-nitrate gel combustion process. Atmospheric plasma-spray (APS) technique was employed to spray deposit the combustion derived feedstock powders. Nevertheless incongruently melting YIG resulted into a two-phase microstructure, Al-YIG powder resulted into a nanostructured garnet single phase when sprayed through thermal plasma. Room temperature saturation magnetization (MS) and Curie temperature (TC) of the Al-YIG powders decreased as a function of increasing Al content. As-sprayed YFe3.8Al1.2O12 coating has a room temperature MS of 6.2 emu/cc and is increased to 7.3 emu/cc after post-deposition heat treatment at 1000 °C/1 h. Microstructural characteristics of single splats were analyzed in order to understand the feedstock effect on deposit.

KW - Iron oxide

KW - Magnetic properties

KW - Nanostructure

KW - Thermal spraying

UR - https://www.scopus.com/pages/publications/34047268011

U2 - 10.1016/j.surfcoat.2007.02.024

DO - 10.1016/j.surfcoat.2007.02.024

M3 - Article

AN - SCOPUS:34047268011

SN - 0257-8972

VL - 201

SP - 7597

EP - 7605

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 16-17

ER -

Phase evolution and magnetic properties of Al substituted yttrium iron garnet nanopowders and plasma-sprayed coatings

Abstract

Keywords

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